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R. N. Dewangan

Publications and source records attributed to R. N. Dewangan.

2 recordsLinked to original sources

$Λ$-CDM type Heckmann - Suchuking model and union 2.1 compilation

In this paper, we have investigated $Λ$CDM type cosmological model in Heckmann-Schucking space-time, by using 287 high red shift ($ .3 \leq z \leq 1.4$ ) SN Ia data of observed absolute magnitude along with their possible error from Union 2.1 compilation. We have used $χ^{2}$ test to compare Union 2.1 compilation observed data and corresponding theoretical values of apparent magnitude $(m)$. It is found that the best fit value for $(Ω_{m})_0$, $(Ω_Λ)_0$ and $(Ω_σ)_0$ are $0.2940$, $0.7058$ and $0.0002$ respectively and the derived model represents the features of accelerating universe which is consistent with recent astrophysical observations.

gr-qc

Anisotropic String Cosmological Models in Heckmann-Suchuking Space-Time

In the present work we have searched the existence of the late time acceleration of the universe with string fluid as source of matter in anisotropic Heckmann-Suchking space-time by using 287 high red shift $(0.3 \leq z\leq 1.4)$ SN Ia data of observed absolute magnitude along with their possible error from Union 2.1 compilation. It is found that the best fit values for $(Ω_{m})_{0}$, $(Ω_Λ)_{0}$, $(Ω_σ)_{0}$ and $(q)_{0}$ are 0.2820, 0.7177, 0.0002 $\&$ -0.5793 respectively. Several physical aspects and geometrical properties of the model are discussed in detail.

gr-qc